How to make pork pie

Mary Berry's best ever chocolate brownies

Makes 24 (336 cals each)Cook's tips: For brownies to be good they must not be overcooked. The secret is to take them out of the oven just before you think they are done – the middle should be soft and squidgy, not set firm. Don't worry if there is a dip in the middle and a crack on top, this is how it should be, and you will find the mixture firms up on cooling.Ingredients * 375g plain chocolate, broken into pieces * 250g baking margarine * 2 tsp instant coffee